摘要:
通过模仿采用模块化组装和发散环化的通用生物合成策略,我们开发了一个四步合成过程,以产生一系列受天然产物启发的支架。通过 Ugi 缩合、N-乙酰乙酰化和重氮转移,将构建块模块化组装到基于哌啶的歧管 6 上,具有羧酸基团,从而产生环化前体。The rhodium-catalyzed tandem cyclization and divergent cycloaddition gave rise to tetracyclic and hexacyclic scaffolds by the appropriate choice of dipolarophiles installed at modules 3 and 4. A different piperidine-based manifold 15 bearing an amino group was successfully applied to